COEXISTENCE OF CONTROL RESOURCE SETS WITH DIFFERENT WAVEFORMS

• US 20180287762A1
• Filed: 03/02/2018
• Published: 10/04/2018
• Est. Priority Date: 03/31/2017
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: SUN, Jing, LUO, Tao, MALIK, Rahul, AKKARAKARAN, Sony, KADOUS, Tamer, REDDY, Akula
• Granted Patent: US 10,623,163 B2
• Time in Patent Office: Days
• CPC Class Codes: H04L 5/0005 Time-frequency
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/006 Quality of the received signal, e.g. BER, SNR, water filling
• CPC Class Codes: H04L 5/0096 Indication of changes in allocation
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

Certain aspects of the present disclosure relate to communication systems, and more particularly, to control resource sets (coresets) for transmitting physical downlink control channels using either a single-carrier waveform or a multicarrier waveform in communications systems operating according to new radio (NR) technologies. In an exemplary method, a base station may determine whether a control resource set (coreset), of time and frequency resources within a control region of system bandwidth and configured for a user equipment (UE), conveys a physical downlink control channel (PDCCH) via a single-carrier waveform or a multicarrier waveform, and transmit the PDCCH to the UE using the determined waveform.

Claims

1. A method for wireless communications by a user equipment (UE), comprising:

determining whether a control resource set (coreset), of time and frequency resources within a control region of system bandwidth, conveys a physical downlink control channel (PDCCH) via a single-carrier waveform or a multicarrier waveform; and

processing the PDCCH according to the determination.

2. The method of claim 1, wherein the determination is based on a frequency band of a carrier in which the coreset is located.

3. The method of claim 1, wherein the determination is based on a carrier frequency of a carrier in which the coreset is located.

4. The method of claim 1, wherein the determination is based on an indication of a carrier dependent decision by a base station (BS) transmitting a signal in the coreset.

5. The method of claim 4, wherein the indication of the carrier dependent decision by the base station (BS) on the coreset is obtained from a master information block (MIB) transmitted from the base station.

6. The method of claim 1, wherein the determination is based on an indication of a coreset dependent decision on waveform for the coreset by a base station (BS) transmitting a signal in the coreset.

7. The method of claim 6, wherein the indication of the coreset dependent decision on waveform for the coreset is obtained from a master information block (MIB) transmitted from the base station.

8. The method of claim 6, wherein the indication of the coreset dependent decision on waveform for the coreset is obtained from UE specific signaling transmitted from the base station.

9. A method for wireless communications by a base station (BS), comprising:

determining whether a control resource set (coreset), of time and frequency resources within a control region of system bandwidth and configured for a user equipment (UE), conveys a physical downlink control channel (PDCCH) via a single-carrier waveform or a multicarrier waveform; and

transmitting the PDCCH to the UE using the determined waveform.

10. The method of claim 9, wherein the determination is based on a frequency band of a carrier in which the coreset is located.

11. The method of claim 9, wherein the determination is based on a carrier frequency of a carrier in which the coreset is located.

12. The method of claim 9, wherein the determination is based on a carrier dependent decision by the BS transmitting a signal in the coreset.

13. The method of claim 12, further comprising:

providing an indication of the carrier dependent decision by the BS in a master information block (MIB) transmitted from the BS.

14. The method of claim 9, wherein the determination is based on a coreset dependent decision by the BS transmitting a signal in the coreset.

15. The method of claim 14, further comprising:

providing an indication of the coreset dependent decision by the BS in a master information block (MIB) transmitted by the BS.

16. The method of claim 14, further comprising:

providing an indication of the coreset dependent decision by the BS in UE specific signaling transmitted by the BS.

17. The method of claim 9, further comprising:

sending UE specific signaling to the UE indicating the determined waveform.

18. The method of claim 9, wherein the determination is based on information regarding a capability of the UE to receive at least one of a single-carrier waveform or a multicarrier waveform.

19. The method of claim 9, wherein the determination is based on information regarding a location of the UE.

20. An apparatus for wireless communications, comprising:

a processor configured to;

determine whether a control resource set (coreset), of time and frequency resources within a control region of system bandwidth, conveys a physical downlink control channel (PDCCH) via a single-carrier waveform or a multicarrier waveform; and

process the PDCCH according to the determination; and

a memory coupled with the processor.

21. The apparatus of claim 20, wherein the processor is configured to determine the whether the coreset conveys the PDCCH via the single-carrier waveform or the multicarrier waveform based on a frequency band of a carrier in which the coreset is located.

22. The apparatus of claim 20, wherein the processor is configured to determine the whether the coreset conveys the PDCCH via the single-carrier waveform or the multicarrier waveform based on a carrier frequency of a carrier in which the coreset is located.

23. The apparatus of claim 20, wherein the processor is configured to determine the whether the coreset conveys the PDCCH via the single-carrier waveform or the multicarrier waveform based on an indication of a carrier dependent decision by a base station (BS) transmitting a signal in the coreset.

24. The apparatus of claim 20, wherein the processor is configured to determine the whether the coreset conveys the PDCCH via the single-carrier waveform or the multicarrier waveform based on an indication of a coreset dependent decision on waveform for the coreset by a base station (BS) transmitting a signal in the coreset.

25. An apparatus for wireless communications, comprising:

a processor configured to;

determine whether a control resource set (coreset), of time and frequency resources within a control region of system bandwidth and configured for a user equipment (UE), conveys a physical downlink control channel (PDCCH) via a single-carrier waveform or a multicarrier waveform; and

cause the apparatus to transmit the PDCCH to the UE using the determined waveform; and

a memory coupled with the processor.

26. The apparatus of claim 25, wherein the processor is configured to determine the whether the coreset conveys the PDCCH via the single-carrier waveform or the multicarrier waveform based on a frequency band of a carrier in which the coreset is located.

27. The apparatus of claim 25, wherein the processor is configured to determine the whether the coreset conveys the PDCCH via the single-carrier waveform or the multicarrier waveform based on a carrier frequency of a carrier in which the coreset is located.

28. The apparatus of claim 25, wherein the processor is configured to:

decide based on a carrier whether the coreset conveys the PDCCH via the single-carrier waveform or the multicarrier waveform; and

determine the whether the coreset conveys the PDCCH via the single-carrier waveform or the multicarrier waveform based on the decision.

29. The apparatus of claim 25, wherein the processor is configured to cause the apparatus to send UE specific signaling indicating the determined waveform to the UE.

30. The apparatus of claim 25, wherein the processor is configured to determine the whether the coreset conveys the PDCCH via the single-carrier waveform or the multicarrier waveform based on information regarding a location of the UE.